Sinus (movie) is the title of a Norwegian low budget movie

A sinus is a pouch or cavity in any organ or tissue, or an abnormal cavity or passage caused by the destruction of tissue. The term is applied to a large number and variety of structures in animals, such as:- The air cavities in the cranial bones, especially those near the nose and connecting to it. These are the paranasal sinuses and are usually what is meant when a person's "sinuses" are referred to. A dilated portion of a blood vein, such as inside the braincase. A chronically infected tract such as a fistula. Another name for the hemocoel, a space in organisms with open circu ...

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